Daylight control: Difference between revisions
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A device operated by daylight, that automatically controls a light source, lighting it at or about sunset and extinguishing it at or about sunrise. | A device operated by daylight, that automatically controls a light source, lighting it at or about sunset and extinguishing it at or about sunrise. | ||
Latest revision as of 08:36, 17 September 2026
A device operated by daylight, that automatically controls a light source, lighting it at or about sunset and extinguishing it at or about sunrise.
Note: If the light source is an electric lamp the device is called a sun switch.
If the light source is a gas flame or a gas mantle, the device is called a sun valve or light valve.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
